ICD-10-PCS 2027 procedure code
099A7ZZDrainage of Left Auditory Ossicle, Via Natural or Artificial Opening
Short description: Drainage of Left Auditory Ossicle, Via Opening
Code last changed in FY2018 (effective October 1, 2017). Source: official FY2027 ICD-10-PCS release from CMS. Page updated September 29, 2026. About our data
About 099A7ZZ
099A7ZZ is the ICD-10-PCS code for a drainage procedure on the left auditory ossicle using a via natural or artificial opening approach. In ICD-10-PCS, drainage means taking or letting out fluids and/or gases from a body part.
In plain terms, this corresponds to other operations on ossicular chain, the ICD-9-CM procedure title it maps to (19.3).
For a different body part, codes include 09937ZZ (right external auditory canal), 09947ZZ (left external auditory canal), 09957ZZ (right middle ear), 09967ZZ (left middle ear), 09977ZZ (right tympanic membrane), 09987ZZ (left tympanic membrane) and 20 more.
The same procedure with a different approach is coded 099A0ZZ (open) and 099A8ZZ (via natural or artificial opening endoscopic).
With a different device, use 099A70Z (drainage device).
It doesn't appear in the MS-DRG procedure index, so on its own it doesn't change the DRG assignment.
It was added in FY2018, effective October 1, 2017.
What each character means
- 1. Section
- 0Medical and Surgical
- 2. Body System
- 9Ear, Nose, Sinus
- 3. Operation
- 9Drainage
Taking or letting out fluids and/or gases from a body part
The qualifier DIAGNOSTIC is used to identify drainage procedures that are biopsies
Includes: Thoracentesis, incision and drainage
- 4. Body Part
- AAuditory Ossicle, Left
Includes: Incus; Malleus; Stapes
- 5. Approach
- 7Via Natural or Artificial Opening
Entry of instrumentation through a natural or artificial external opening to reach the site of the procedure
- 6. Device
- ZNo Device
- 7. Qualifier
- ZNo Qualifier
Other versions of this procedure
Different body part
- 09937ZZExternal Auditory Canal, Right
- 09947ZZExternal Auditory Canal, Left
- 09957ZZMiddle Ear, Right
- 09967ZZMiddle Ear, Left
- 09977ZZTympanic Membrane, Right
- 09987ZZTympanic Membrane, Left
- 09997ZZAuditory Ossicle, Right
- 099B7ZZMastoid Sinus, Right
- 099C7ZZMastoid Sinus, Left
- 099D7ZZInner Ear, Right
- 099E7ZZInner Ear, Left
- 099F7ZZEustachian Tube, Right
Different approach
Different device
Different qualifier
ICD-9-CM equivalent
Converter →- 19.3Other operations on ossicular chainapproximate
From the CMS 2018 General Equivalence Mappings (GEMs), the final GEMs release.
Code history
- 2016
- 2017
- 2018
- 2019
- 2020
- 2021
- 2022
- 2023
- 2024
- 2025
- 2026
- 2027
- FY2018 (effective 10/1/2017): Added
- No changes since FY2018.
Common questions about 099A7ZZ
Is 099A7ZZ a valid ICD-10-PCS code for 2027?
- Yes. 099A7ZZ is valid for inpatient procedures from October 1, 2026 through September 30, 2027.
What is the ICD-9 procedure code for 099A7ZZ?
- The CMS GEMs map 099A7ZZ to ICD-9-CM 19.3 (Other operations on ossicular chain).